mirror of
https://github.com/vbatts/go-mtree.git
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109 lines
2.4 KiB
Go
109 lines
2.4 KiB
Go
package cli
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import (
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"flag"
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"fmt"
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"strconv"
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)
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// TakesValue returns true of the flag takes a value, otherwise false
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func (f *IntFlag) TakesValue() bool {
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return true
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}
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// GetUsage returns the usage string for the flag
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func (f *IntFlag) GetUsage() string {
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return f.Usage
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}
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// GetCategory returns the category for the flag
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func (f *IntFlag) GetCategory() string {
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return f.Category
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}
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// GetValue returns the flags value as string representation and an empty
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// string if the flag takes no value at all.
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func (f *IntFlag) GetValue() string {
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return fmt.Sprintf("%d", f.Value)
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}
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// GetDefaultText returns the default text for this flag
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func (f *IntFlag) GetDefaultText() string {
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if f.DefaultText != "" {
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return f.DefaultText
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}
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if f.defaultValueSet {
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return fmt.Sprintf("%d", f.defaultValue)
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}
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return fmt.Sprintf("%d", f.Value)
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}
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// GetEnvVars returns the env vars for this flag
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func (f *IntFlag) GetEnvVars() []string {
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return f.EnvVars
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}
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// Apply populates the flag given the flag set and environment
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func (f *IntFlag) Apply(set *flag.FlagSet) error {
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// set default value so that environment wont be able to overwrite it
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f.defaultValue = f.Value
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f.defaultValueSet = true
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if val, source, found := flagFromEnvOrFile(f.EnvVars, f.FilePath); found {
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if val != "" {
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valInt, err := strconv.ParseInt(val, f.Base, 64)
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if err != nil {
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return fmt.Errorf("could not parse %q as int value from %s for flag %s: %s", val, source, f.Name, err)
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}
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f.Value = int(valInt)
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f.HasBeenSet = true
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}
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}
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for _, name := range f.Names() {
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if f.Destination != nil {
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set.IntVar(f.Destination, name, f.Value, f.Usage)
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continue
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}
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set.Int(name, f.Value, f.Usage)
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}
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return nil
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}
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// Get returns the flag’s value in the given Context.
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func (f *IntFlag) Get(ctx *Context) int {
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return ctx.Int(f.Name)
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}
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// RunAction executes flag action if set
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func (f *IntFlag) RunAction(c *Context) error {
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if f.Action != nil {
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return f.Action(c, c.Int(f.Name))
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}
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return nil
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}
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// Int looks up the value of a local IntFlag, returns
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// 0 if not found
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func (cCtx *Context) Int(name string) int {
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if fs := cCtx.lookupFlagSet(name); fs != nil {
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return lookupInt(name, fs)
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}
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return 0
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}
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func lookupInt(name string, set *flag.FlagSet) int {
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f := set.Lookup(name)
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if f != nil {
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parsed, err := strconv.ParseInt(f.Value.String(), 0, 64)
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if err != nil {
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return 0
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}
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return int(parsed)
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}
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return 0
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}
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